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40hz for 2512?
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<blockquote data-quote="Moble Enclosurs" data-source="post: 7618863" data-attributes="member: 634917"><p>By having it tuned around 30Hz, you create an out of phase response from around 33hz-70Hz, but this can be adjusted by putting the port on the side and sub to the back or on the top. So, I will not argue that a lower tuning will still work with this driver, but I want to show you something.</p><p></p><p><a href="http://imageshack.us/photo/my-images/688/phase379high30s.png/" target="_blank"><img src="http://img688.imageshack.us/img688/1330/phase379high30s.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p></p><p>This first image is the phase of the 3.79@38Hz. Everything is explained in the pictures. This is to compare my recommendation with the others.</p><p></p><p><a href="http://imageshack.us/photo/my-images/16/phase379low30s.png/" target="_blank"><img src="http://img16.imageshack.us/img16/9573/phase379low30s.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p></p><p>The second one is the phase of my 3.79@32Hz--your lower tuning preference.</p><p></p><p><a href="http://imageshack.us/photo/my-images/849/phase25low30s.png/" target="_blank"><img src="http://img849.imageshack.us/img849/8665/phase25low30s.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p></p><p>This third one, is your 2.5@31-32Hz. Notice the out of phase band. This will effect low end but you will not notice it due to tuning. In this example, tuning is a "fix" for lost output. Not something I want to deal with when designing. I do not hide output loss. I correct it.</p><p></p><p><a href="http://imageshack.us/photo/my-images/696/khvkjhvjhkvkl.png/" target="_blank"><img src="http://img696.imageshack.us/img696/5286/khvkjhvjhkvkl.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p></p><p>The one above shows the responses of my 3.79@38Hz, and your 2.5@32Hz. You do get output increase below 35Hz with your tuning, but this will change with acoustical loss from phase output, and also my response is an average of 2-3dB higher in the rest of the response.</p><p></p><p><a href="http://imageshack.us/photo/my-images/14/iygukjhtkiu.png/" target="_blank"><img src="http://img14.imageshack.us/img14/3010/iygukjhtkiu.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p></p><p>This last one adds my 3.79@32Hz to show the output comparison to your 2.5@32Hz.</p><p></p><p>Also, the Group Delay is decreased by 14% by going from 2.5@32Hz to 3.79@38Hz. It goes from 70 msec peak to below a 60msec peak. Also, it gets rid of the peak just above 120Hz.</p><p></p><p>This is just to show the given against my recommended. Not to start any preference wars. I just need to show you that there is a reason for my recommendations, and I do not disagree with any other of your guys' recommendations either. If they work for you, they work. That is perfectly ok. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif</p></blockquote><p></p>
[QUOTE="Moble Enclosurs, post: 7618863, member: 634917"] By having it tuned around 30Hz, you create an out of phase response from around 33hz-70Hz, but this can be adjusted by putting the port on the side and sub to the back or on the top. So, I will not argue that a lower tuning will still work with this driver, but I want to show you something. [URL="http://imageshack.us/photo/my-images/688/phase379high30s.png/"][IMG]http://img688.imageshack.us/img688/1330/phase379high30s.png[/IMG][/URL] This first image is the phase of the 3.79@38Hz. Everything is explained in the pictures. This is to compare my recommendation with the others. [URL="http://imageshack.us/photo/my-images/16/phase379low30s.png/"][IMG]http://img16.imageshack.us/img16/9573/phase379low30s.png[/IMG][/URL] The second one is the phase of my 3.79@32Hz--your lower tuning preference. [URL="http://imageshack.us/photo/my-images/849/phase25low30s.png/"][IMG]http://img849.imageshack.us/img849/8665/phase25low30s.png[/IMG][/URL] This third one, is your 2.5@31-32Hz. Notice the out of phase band. This will effect low end but you will not notice it due to tuning. In this example, tuning is a "fix" for lost output. Not something I want to deal with when designing. I do not hide output loss. I correct it. [URL="http://imageshack.us/photo/my-images/696/khvkjhvjhkvkl.png/"][IMG]http://img696.imageshack.us/img696/5286/khvkjhvjhkvkl.png[/IMG][/URL] The one above shows the responses of my 3.79@38Hz, and your 2.5@32Hz. You do get output increase below 35Hz with your tuning, but this will change with acoustical loss from phase output, and also my response is an average of 2-3dB higher in the rest of the response. [URL="http://imageshack.us/photo/my-images/14/iygukjhtkiu.png/"][IMG]http://img14.imageshack.us/img14/3010/iygukjhtkiu.png[/IMG][/URL] This last one adds my 3.79@32Hz to show the output comparison to your 2.5@32Hz. Also, the Group Delay is decreased by 14% by going from 2.5@32Hz to 3.79@38Hz. It goes from 70 msec peak to below a 60msec peak. Also, it gets rid of the peak just above 120Hz. This is just to show the given against my recommended. Not to start any preference wars. I just need to show you that there is a reason for my recommendations, and I do not disagree with any other of your guys' recommendations either. If they work for you, they work. That is perfectly ok. [IMG]//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif[/IMG] [/QUOTE]
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